The ionic equations below represent four reactions. $Z + X^{2+} \rightarrow Z^{2+} + X$ $Z + 2W^{+} \rightarrow Z^{2+} + 2W$ $X + 2W^{+} \rightarrow X^{2+} + 2W$ $Y + Z^{2+} \rightarrow Y^{2+} + Z$ What is the reactivity order of the four metals, W, X, Y and Z?
- AW → X → Z → Y
- BX → W → Y → Z
- CY → Z → X → W
- DZ → W → X → Y